| GJD Inspection Services Limited | Information & communication | 2014 |
| Gladson Cleethorpes Ltd | Real estate | 2016 |
| Glasshouse Cleethorpes Limited | Hospitality | 2020 |
| Glencoyne Engineering Ltd | Wholesale & retail | 2006 |
| Glentworth HDD Services Ltd | Construction | 2022 |
| Glenwood Contractors Property Limited | Real estate | 2024 |
| Global Commissioning Solutions Ltd | Other services | 2011 |
| Global Insulated Solutions Ltd | Construction | 2014 |
| Glossop Contract Engineering Ltd | Professional & scientific | 2022 |
| GM Convenience Limited | Wholesale & retail | 2013 |
| Gmap Group Ltd | Administrative & support | 2018 |
| GNB Industries Ltd | Wholesale & retail | 2017 |
| Go Legal Ltd | Extraterritorial | 2017 |
| Go Local Food & Wine Ltd | Wholesale & retail | 2025 |
| Go Local Grimsby Road Ltd | Wholesale & retail | 2025 |
| Go Local High Street Ltd | Wholesale & retail | 2021 |
| Goddard Consulting Group Limited | Professional & scientific | 2021 |
| Goldleaf Trading Ltd | Manufacturing | 2019 |
| Goodhall Spraying Specialists Ltd | Construction | 2024 |
| Goverdene Successful Ltd | Wholesale & retail | 2015 |
| GR8 White Fish Limited | Hospitality | 2021 |
| Graglia Limited | Hospitality | 2025 |
| Graham Buston Taxi Services Ltd | Transport & logistics | 2022 |
| Graphite One Limited | Professional & scientific | 2014 |
| Grassington Traditional Ltd | Wholesale & retail | 2015 |
| Great Grimsby Traditional Smoke Fish Ltd | Manufacturing | 2017 |
| Great Northern & East Lincolnshire Railway Limited | Transport & logistics | 1981 |
| Greenswear Limited | Wholesale & retail | 2003 |
| Grim & Gleeful CIC | Education | 2025 |
| Grimsby 117A Clee Limited | Real estate | 2024 |
| Grimsby and Cleethorpes Amateur Operatic Society | Arts & recreation | 1996 |
| Grimsby Borough FC Ltd | Arts & recreation | 2024 |
| Grimsby Car Wash Limited | Administrative & support | 2017 |
| Grimsby Chippy Ltd | Hospitality | 2025 |
| Grimsby Dark Kitchen Ltd | Hospitality | 2022 |
| Grimsby Fish Sales Limited | Hospitality | 1999 |
| Grimsby Hazara Community CIC | Education | 2026 |
| Grimsby News and Pictures Agency Ltd | Professional & scientific | 2020 |
| Grimsby Premier Care Company Ltd | Health & social care | 2022 |
| Grimsby Road Developments Management Limited | Real estate | 2005 |
| Grimsby Road Premier Ltd | Wholesale & retail | 2024 |
| Grimsby Tugs & Workboats Limited | Transport & logistics | 2009 |
| Grimsby Van and Commercials Ltd | Manufacturing | 2025 |
| Grit Fitness Limited | Arts & recreation | 2025 |
| Gscladding Services Ltd | Construction | 2019 |
| GSN Carpets Limited | Wholesale & retail | 2016 |
| GT Automotive Group Ltd | Wholesale & retail | 2020 |
| Gtech Logistics Limited | Extraterritorial | 2006 |
| GVH Consulting Services Ltd | Professional & scientific | 2018 |
| GWS Accounts Limited | Professional & scientific | 2005 |
| GY Finance Ltd | Professional & scientific | 2023 |
| H Jacklin Electrical Ltd | Construction | 2022 |
| H Karim Limited | Construction | 2022 |
| H Stones & Grandson Ltd | Extraterritorial | 2017 |
| Hague Property Rentals Ltd | Real estate | 2019 |
| Haile Sands Ltd | Real estate | 2020 |
| Hair at the Olive Room Limited | Other services | 2024 |
| Hair by Jodie Jones Limited | Other services | 2026 |
| Haku Enterprises Ltd | Wholesale & retail | 2025 |
| Hall ARB Contracting Ltd | Agriculture & fishing | 2023 |
| Hall Trees Limited | Agriculture & fishing | 2023 |
| Hand Car Wash & Valeting Centre Limited | Administrative & support | 2022 |
| Handy Motors Ltd | Wholesale & retail | 2020 |
| HAO YUN LAI 888 Limited | Hospitality | 2020 |
| Harlow and the Hare Ltd | Wholesale & retail | 2020 |
| Hartung Properties Limited | Real estate | 2003 |
| Harwood Leisure (NO.2) Limited | Arts & recreation | 1990 |
| Hassle Free Tax Ltd | Professional & scientific | 2008 |
| Hats and Tiaras Ltd | Wholesale & retail | 2017 |
| Haulage Hound Ltd | Professional & scientific | 2025 |
| Hawthorne Safety and Environmental Services Limited | Other services | 2016 |
| HBT Instruments Ltd | Professional & scientific | 2023 |
| HCT Document Controlling Services Limited | Administrative & support | 2024 |
| Healthy Touch PB Ltd. | Other services | 2014 |
| Heavensgate Investments Ltd | Real estate | 2019 |
| Hedison Group Limited | Information & communication | 2020 |
| Hedison Properties Limited | Real estate | 2024 |
| Heneage Property Ltd | Real estate | 2021 |
| Hess Heating Ltd | Construction | 2022 |
| HGB Access Ltd | Manufacturing | 2024 |
| Hi-Q Automotive UK Ltd | Wholesale & retail | 2017 |
| Highcliff Property Management Limited | Real estate | 1998 |
| Highwind Inns Ltd | Hospitality | 2020 |
| Hill Rolling Limited | Wholesale & retail | 2025 |
| Hillcrest Cleethorpes Limited | Households | 2021 |
| Hillyards Fencing and Decking Services Limited | Administrative & support | 2021 |
| Hillyards Total Property Services Ltd | Construction | 2018 |
| Hire Talent Group Ltd | Financial services | 2024 |
| HMC Electricals Ltd | Construction | 2021 |
| Hoarderz Limited | Information & communication | 2012 |
| Hodson (Architects) Limited | Professional & scientific | 2003 |
| Holidays by Design (Brigg) Limited | Administrative & support | 2021 |
| Holidays by Design (Cleethorpes) Limited | Administrative & support | 2017 |
| Holydyke Building Developments Limited | Construction | 2025 |
| Home Bright (March) Limited | Administrative & support | 2018 |
| Honeypot Rentals Limited | Real estate | 2025 |
| Hosanna Tech Limited | Information & communication | 2023 |
| Hoult Property Limited | Real estate | 2020 |
| House of Rose and Co Ltd | Other services | 2025 |
| Howard Swindell Character Studio Limited | Arts & recreation | 2019 |